Random Chitchat 2012-2016

[FakeTruth]

Good luck "unrolling" this

float gBailout = 10.0f;
__host__ __device__ float DE(const float3& pos) 
{
	float3 zn = pos;
	float hit = 0.0;
	const float p = 8.0;
	float d = 1.0;

	float th = 0.0f;
	float phi = 0.0f;
	float rado = 0.0f;
	float sint = 0.0f;

	// 15
	for( int i = 0; i < 10; i++ )
	{
		float rad = float3len(zn);

		if( rad > 2.0f )
		{	
			hit = 0.5f * logf(rad) * rad / d;
		}else{			
			th = atan2f( float2len(zn.x, zn.y), zn.z );
			phi = atan2f( zn.y, zn.x );		
			rado = powf(rad,8.0);
			d = powf(rad, 7.0f) * 7.0f * d + 1.0f;



			sint = sinf( th * p );
			zn.x = rado * sint * cosf( phi * p );
			zn.y = rado * sint * sinf( phi * p );
			zn.z = rado * cosf( th * p ) ;
			zn = float3add(zn, pos);
		}

	}

	return hit;
}

I actually suspect this function to "roll" it into a sphere anyway, if you increase the power in this function (it's 8 right now) it will repeat itself many times and display a clear pattern. Unrolling the Mandelbulb would simply yield a terrain with "bulbs" all over the place as seen on the Mandelbulb repeated already.

This video keeps changing the power all the time, to give you an impression of what it does to the Mandelbulb http://www.youtube.com/watch?v=z4wy_oc6Y3A

This is what it looks like with a power of 16. As you can see it simply repeats the bulbs more.